Extra Lives - Usually you only get just 3 lives in this game, but after your 3rd life is gone, press the following button sequence: A, B, B, A and you'll get 3 more lives. You can do this as many
times as you want and you'll eventually beat the game!

Player Two Can Enter One Player Game - Player 2 can enter a one-player game at any time by pressing A, B, B, A on controller two.

Two Tanks or Helicopters instead of One - In a 2 player, when you see a tank or a helicopter, both players should position their characters near the tank or helicopter and press A at the samt time.
Instead of only one player getting the helicopter or tank, both players get one!